Sawmill



19 E. P; Tu-FTs- 1,899,448

' SAWMILL Filed Sept. 2, 1952 2 Sheets-Sheet 1 Inventor Edward P. TuFTswwkm Attorneys E. TU FTS 1,899,448

SAWMILL File Sept. 2,1932 2 Sheets-Sheet 2 Feb. 23, 1933.

This invention relates to sawmills an htticill arlyjtoi the. head qblock;.I'1 1f h3r ii I1f jzgwhiph z th..kneesjgof:theoarri geare ade H .Jo rl th i upp rt n is i e a h 1 w ends lon i dinal rria e an Wh Pr v d d. ti s wv-.: 1- 1-pi1 1 lrw ii h mes wi ra kse te ne i y sec r d oe ece rra e- 5 ;suit b ep w i a d .mt'sh'etmp eni i I employed. for turninglthe1 a direci-i o ,jtionuto feed thefifidfl 9 fvvith its kneesn fi for?ievanced after Leach lboa'rd :or 1 slab has, been Limit to positionlthelog-for a Qfres'heut and WhiChxthQ; knees ;,are. mtr'nc;ted) v to place:fthQIIl QiIlnafl position. {Ito have an uncut log qilareed \onthehaJfriageJ-g In ;many, sawmills thegforfivar'di eadvanceu oi thevkneesiofjipos i-i @3510 tioning the log after eich cntisaCGOn PIishedEthrofigh-..t. a :iemanu ally -opei'ated' epa'iwl', fan d lratchetmechanism; ;1 land; thejireturn move- --.'ment ofilthe. knees to theirretracted .position" m I g l i Qen -,wfeedsp i He-Whi i ilp Qwll'yeonne'e ed 50 w an"eo emt n llev fi'- 1 iandi is adapt d in 9Qf0P raQyitli-;then

- is izccornplished "by means whichi is actuated'byithefrnovement.oithemcarriagez Qnelof thei obj, tsofig'my;,ypresient; invene -:.tion; to provided novel, construction -by'ifmohanism ewillplbe'z automatically released;;whn;theoniechanisinifonretreoting the knees Qisgrendered noperative;thus obviating any possibility athate the? pawls might 1 be in en-.gtg'ement' during {such return; movement."

In ordertorigivefan illnder'standing .;of;the

invention I have illustri'aited fin'the drawings selected. mbQdimentthereof whichpiwill A v 1 adv n he: slide 9 to thedQSir d ex en 1. in cs' top. pe p vom xmeunte 3 r vat 41" and jadapted-toengage a ratehetgora Y to h Wheel fi nwh ch is f n t e; ha s10- JTheit t j fzt h tl3,aresqm fthe ratehgit;

i ne beid'scribedga'fteri which the novel j fee:

' ;.tliresi. .willo.be pointed Tout T- inIthe appended I leis; ee-perspective lview lvvith gperts ebrokenufoutiiilllistrdti gi'iisavvmillfembody h I H hficoarsrthan.; thefte th ing my invention;

Ff @2'is aifragmentary plan oif the H g r 1 s M ens r p vided.f ritraetgth lpawhreleasingjmechanism which are of usual; constructionfa'resillus-f atrslt'ed in: dottedrlines' iindzthe parts embody a g V v thlsshaft QOiS prml 'ded'With n frigtionjwh ln;

-ingg-thiinvnt10n are showminfull liness 1'iThe's2iv vmi11.compriseswthe usnal frame 1 which iineludes sthe' iraiils" 2?: and 3011; which ..thex.cerriege- 4 'rides back-andfforthl ,The

frame is. provided with :the extension. .18 -;6v1iichi supports the saw'arbor. "5: carrying the 7 'saw 6, said saw arbor being driven from adriving pulley 7. The carriage illiasfithefz :usi i: 8zmountdithereon,which; are-1: adaptedltohe movedtransverselyv offtheoari riagena Inl the presentg construction :fthese have m m tra r e yvi e el ieg ends i ratehet Wheel 13.; I

.1 T re s r 1. speci l y;equat d igfi shaft a.n. l t spr vricledz ith 11lvr nm I Vat i sup r en whi rmin s. neiha v dle, e hand is o itu t withnlc venient reachl ofthe operator hogener eHy t nd ixo' i 'on s deof; ths l 21 adi q i th mm ext ns o 1 1 1 W i h-t s w arb r im llnteiy manipulng-the, 1e th ope t r can tu n t e af and: hus" w s sl1mi ni'w-millnfeeddevibes; v

esl I ,v ic pshe t carrying: t-i s upp en na pinioni'21' which, meshewith} af 'raclgl22 ou tedvon t e; slide 9- The, low r ,.e d 0 L-Whi h.is d pt o engage. the", si e. ac

24 1f af longitudinalllyeextending member 25.

The member 2 i ymo nted f r movemen -f 1 Ward and, from'the rail 3.saidgn emberjjis 5 51 0 1 31 in'lpos fiiongwherethe fa ce QA is;out e Voi engagement with the frictionwheelfl i hut whe'mthe op atiorf wi hes tract; he. sli

91 he1 'shiftS-v the,position of; th emb f e ,away from th rai113 tobringt ei r ct n, a M-thereof into, engagement withfth e frictionithemedium of a spring 27. The member. v is moved into its operativeposition-through. the movement of" a treadle 28 pivotally mounted inbearings 29 which areconnected to the rail 2., This treadle has thedownwardly-extending endpportion f 30-.which is connected by a cord 31to one end of the member 25.. When the tread-1e is depressed a pullingforce will be appliedtotheconk connected thereto, which link is providednection 31 which will move the longitudinally-extending member 25 awayfrom the rail 3and the links 26 serveto maintain the face24 of saidmember always in parallel relation with the rails. Such movement of themember 25 brings the face 24 into engagement withthe friction wheel 23as above de scribed with the result that the movement of a the carriageon the rails will serve to shift the slide 9 on thecarriage. v

The present invention provides novel means whereby the shifting of thelongitudinally-extending member 25 into its operative position willautomatically release the pawls 14 and 19 so as to permitthe free back--ward rotation ofthe shaft 10. This release of the pawls is secured by apawl-releasing mechanism which is rendered operative by the member 25when it moves into its operative position.

-=The carnage 4" has suspendedltherefrom an arm 32 which ispivotallyinounted at 33 34 adapted to be engaged by the longitudi- 1nally-extending member 25 when the latter and which carries at its lowerend a wheel is'moved into its operative position. This arm 32 isconnected to a pawl-releasing member '35 WlllCll is mountedon thecarriage and "extends transversely thereof. Such pawlbearings 48 mountedon' the carriage4 releasing member is supported on arms 36 a which arepivoted at one endin bearings 37 secured to the carriage'and'which arepivoted at their upper ends to the member 35.

46 indicates a shaft which is journalleg in ne end of said shaft isprovided with an offset portion 49 which is-pivotallyconnected to thepawl-releasing member 35 and the other end is provided with an arm 47which is pivotallyconnected to the upper end of a link 38, the lower endof which thearm32. 1 7

When the longitudinally-extending member-25is moved into operativeposition into engagement with the friction wheel 23 said ispivotallyconnected to member will engagethe wheel 34 at the lower end ofthe arm 32 and swing the latter to the left Fig. 3. Suchswingingmovement ofthe,

arm- 32 operates through the link 38 to turn the shaft 46 and theturning movement of the shaft operates through the arm 49 to raise thedog-releasing member 35, such member swinging about the arms 36duringits rising movement. Such rising movement of the member 35' serves torelease the. pawls 14 and 19 by the following mechanism.

with apin or proj ecti0n43 that extends across the upper edge of thequadrant39 so that when said quadrant is turned about its axis theupward swinging movement thereof Wlll operate through the link 42 toraise the "pawll4 out of vengagement with the ratch- Thelower end of thequadrant member 39 hasaalaterally-extending foot 44 secured theretowhich normally rests on the pawlreleasing member 35. When saidpawl-releasing member is raised as above'described it acts throughnthefoot 44 to swing the quadrant member 39-about its pivot 41 therebyraising the feed pawl 14 out of engagement Withthe ratchet 13 as abovedescribed.

Such swinging rmovement of the quadrant member also operates through thefinger 45 to raise the stop pawl 1-9 so that both pawls 14 and=19 aredisconnected from the'ratchet structure by the swinging movement of thequadrant member 3 9.

the use of the swinging arm 32, the link 38 and dog-releasing member 35,the pawls14 and 19 will be automatically disconnected from the ratchetstructure by the movement given to the longitudinally-ex tending member25by the depression of the treadle 28. r i

The clearance between thermenibers25" and the roll 34 is less than thatbetween said,

c member andthe wheel 23 so that the pawls will be releasedbefore themember 25 is brought into operative engagement with the wheel23. V. i,

i There is herein shownmeans fo'r:releasing the pawls manually. The arm1 16 is provided with a lateralprojection 53'wh'ich is connected a link54 to the quadrantmem- 'ber 39 so that an upward swinging move- 0 mentof the arm l6'wil1 operate to raise the quadrant member 39 and thusdisconnect the pawlsn J l i I claim: 4

3 1; A sawmill having a carriage provided with transversely-extendingracks, rails on whichilsaid 'carriageQt-ravels, a knee-support operativ,said pivoted member having an extension adapted to be engaged by thepawlreleasing member when the latter moves up wardly thereby to give thepivoted member its swinging movementby which the awls are released.

name to this specification.

EDWARD P. TUFTs.

c ln testimonywhereofil havesigned my ly ito release both pawls from theratchet,

mounted on the carriage and extending transversely thereof,meansto'raise said pawl-releasing member when the slide-re tra'ctingmeans, is rendered operative, and means actuated bythevertical movementof said pawl-releasingmember to swingsaid upwardly thereby to release 7pivoted member the pawls. a a

2. A sawmill having a carriage-provided with transversely-extendingracks, rails" on which. said carriage travels, a knee-support ing slidemounted on the carriage to ;.move

a transversely thereof, a shaft ,journal1ed-. in said slide, pinions onthe shaftmeshing with i j 7 said racks, a ratchet on said shaft, 'amanual;

Y a vertically-movable pawl-releasing member 'ly-operated feedpawlco-operatingwiththe f ratchet for rotating the shaft tofadvance the.slide, a stop pawl to prevent retrogrademove5- ment of'the slide,slide-retractingmeans actufated by the movementofthe carriage, a mem berpivoted to thecarriage and operating when swung upwardly to release bothpawls? from the ratchet, a vertically movable pawl-c releasing membermounted onthecarriage and extending transversely thereof,1means to Iraise said pawl-releasing member when the slide-retracting means isrendered operative, andconnectionsbetween said pawl-releasing member andsaid pivoted member which are operative in all positions of theslide andby which the rising movement of thepawl-re- 5 leasing member swings thepivoted member upwardly and thereby releases the pawls.

3.7 A sawmill having acarriageprovided with transversely-extendingracks, rails on which said carriage travels,;,a knee-supporting slidemountedgon the carriage to move transversely thereof,fa shaftjournallejd in;

said slide,'pinions;on the shaftmeshingiwith V ly-operated feed pawlco-operatingnwith the ratchet for rotating-the shaftto'advance the isaid racks, a ratchet on said shaft,a manual- 1 slide, a stop pawl toprevent .--retrogrademovement of the slide, sliderretracting meansactuated by the movement. of the'carriage, a

' member pivoted to the: carriage and operat ing when swung upwardly torelease both 7 pawls from the,ratc het,"a vertically-movable; r

pawl-releasing member mounted on the carriage and extending transverselythereof,

means to raiseisaid pawl'-releasing,member when the Shde retractmgmeansis rendered

